Merge pull request #47239 from jonathanhefner/test_command-thor-help

Incorporate Thor help into test command help

railties/lib/rails/commands/test/USAGE

@@ -0,0 +1,9 @@
+You can run a single test by appending a line number to a filename:
+
+  <%= executable %> test/models/user_test.rb:27
+
+You can run multiple files and directories at the same time:
+
+  <%= executable %> test/controllers test/integration/login_test.rb
+
+By default test failures and errors are reported inline during a run.

railties/lib/rails/commands/test/test_command.rb

@@ -8,25 +8,23 @@
 module Rails
   module Command
     class TestCommand < Base # :nodoc:
+      def self.executable(*args)
+        args.empty? ? Rails::TestUnitReporter.executable : super
+      end
+
       no_commands do
-        def help
-          say "Usage: #{Rails::TestUnitReporter.executable} [options] [files or directories]"
-          say ""
-          say "You can run a single test by appending a line number to a filename:"
-          say ""
-          say "    #{Rails::TestUnitReporter.executable} test/models/user_test.rb:27"
+        def help(command_name = nil, *)
+          super
+          if command_name == "test"
+            say ""
+            say self.class.class_usage
+          end
           say ""
-          say "You can run multiple files and directories at the same time:"
-          say ""
-          say "    #{Rails::TestUnitReporter.executable} test/controllers test/integration/login_test.rb"
-          say ""
-          say "By default test failures and errors are reported inline during a run."
-          say ""
-
           Minitest.run(%w(--help))
         end
       end
 
+      desc "test [PATHS...]", "Run tests except system tests"
       def perform(*args)
         $LOAD_PATH << Rails::Command.root.join("test").to_s